In australia at least BPD is not considered and offical mental illness as yet......It would be a mental illness in my oppinion as but there is less chemical involved and more social upbrining that causes it rather than just an chemical imbalance from what I read and what my last T and new T have tole me.

You more likly to have BPD when you've been a victom of a negative role models, or victimized by main caregivers ect. BPD is more to do with the way you really are as a person rather than a chemical imbalance changeing your personailtyu hench why its called a personailty disorder.